//check if a function exists
function function_exists(function_name)
{
	if (typeof function_name == 'string')
		return (typeof window[function_name] == 'function');
	return (function_name instanceof Function);
}

//update display of the availability of the product AND the prices of the product
function updateDisplay()
{
	if (!selectedCombination['unavailable'])
	{
		//hide the hook out of stock
		$('#oosHook').hide();
		
	}
	else
	{
		//show the hook out of stock
		$('#oosHook').show();
		if ($('#oosHook').length > 0 && function_exists('oosHookJsCode'))
			oosHookJsCode();
		
		//display that the product is unavailable with theses attributes
		if (!selectedCombination['unavailable'])
			$('#availability_value').text(doesntExistNoMore + (globalQuantity > 0 ? ' ' + doesntExistNoMoreBut : '')).addClass('warning-inline');
		else
			$('#availability_value').text(doesntExist).addClass('warning-inline');
		$('#availability_statut:hidden').show();
	}
}

//update display of the large image
function displayImage(domAAroundImgThumb)
{
    if (domAAroundImgThumb.attr('href'))
    {
        var newSrc = domAAroundImgThumb.attr('href');
		var nowlenth = newSrc.length -12;
		var nowSrc = newSrc.substr(0,nowlenth) + '.jpg';
		if ($('#image-block a').attr('href') != nowSrc)
		{ 
			$('#bigpic').fadeTo('fast', 1, function(){
				$('#image-block a').attr('href', nowSrc);
			});
        }
        if ($('#bigpic').attr('src') != newSrc)
		{ 
			 $('#bigpic').fadeOut('fast', function(){
                $(this).attr('src', newSrc).show();
            });
        }
    }
}


// Serialscroll exclude option bug ?
function serialScrollFixLock(event, targeted, scrolled, items, position)
{
	serialScrollNbImages = $('#thumbs_list li:visible').length;
	serialScrollNbImagesDisplayed = 3;
	$('a#view_scroll_left').css('cursor', position == 0 ? 'default' : 'pointer').fadeTo(0, position == 0 ? 0 : 1);		
	$('a#view_scroll_right').css('cursor', position + serialScrollNbImagesDisplayed >= serialScrollNbImages ? 'default' : 'pointer').css('display', position + serialScrollNbImagesDisplayed >= serialScrollNbImages ? 'none' : 'block');
	return true;
}

// Change the current product images regarding the combination selected
function refreshProductImages(id_product_attribute)
{
	$('#thumbs_list_frame').scrollTo('li:eq(0)', 700, {axis:'x'});
	$('#thumbs_list li').hide();
	id_product_attribute = parseInt(id_product_attribute);

	if (typeof(combinationImages) != 'undefined' && typeof(combinationImages[id_product_attribute]) != 'undefined')
	{
		for (var i = 0; i < combinationImages[id_product_attribute].length; i++)
			$('#thumbnail_' + parseInt(combinationImages[id_product_attribute][i])).show();
	}
	$('#thumbs_list_frame').width((parseInt(($('#thumbs_list_frame >li').width())* i) + 3) + 'px'); //  Bug IE6, needs 3 pixels more ?
	$('#thumbs_list').trigger('goto', 0);
	serialScrollFixLock('', '', '', '', 0);// SerialScroll Bug on goto 0 ?
}

//To do after loading HTML
$(document).ready(function()
{
	//init the serialScroll for thumbs
	$('#thumbs_list').serialScroll({
		items:'li:visible',
		prev:'a#view_scroll_left',
		next:'a#view_scroll_right',
		axis:'x',
		offset:0,
		start:0,
		stop:true,
		onBefore:serialScrollFixLock,
		duration:700,
		step: 2,
		lazy: true,
		lock: false,
		force:false,
		cycle:false
	});
	
	$('#thumbs_list').trigger('goto', 1);// SerialScroll Bug on goto 0 ?
	$('#thumbs_list').trigger('goto', 0);

	//hover 'other views' images management
	$('#views_block li a').hover(
		function(){displayImage($(this));},
		function(){}
	);
	
	//set jqZoom parameters if needed
	if (typeof(jqZoomEnabled) != 'undefined' && jqZoomEnabled)
	{
		$('img.jqzoom').jqueryzoom({
			xzoom: 200, //zooming div default width(default width value is 200)
			yzoom: 200, //zooming div default width(default height value is 200)
			offset: 21 //zooming div default offset(default offset value is 10)
			//position: "right" //zooming div position(default position value is "right")
		});
	}
	//add a link on the span 'view full size' and on the big image
	$('span#view_full_size, div#image-block img').click(function(){
		$('#views_block li a.shown').click();
	});

});

function saveCustomization()
{
	$('#quantityBackup').val($('#quantity_wanted').val());
	$('body select[@id^="group_"]').each(function() {
		$('#customizationForm').attr('action', $('#customizationForm').attr('action') + '&' + this.id + '=' + parseInt(this.value));
	});
	$('#customizationForm').submit();
}